TW201813355A - Method of transmitting a reference signal, network device and terminal device - Google Patents

Abstract

The present invention discloses a method of transmitting a reference signal, a network device and a terminal device. The method includes: the network device of the first cell determines the first resource unit corresponding to the first cell and at least one second resource unit corresponding to at least one second cell; the network device determines, in the first resource unit and the at least one second resource unit, a resource unit having the largest time domain resource and a resource unit having the largest frequency domain resource; the network device determines the reference signal resource according to the resource unit having the largest time domain resource and the resource unit having the largest frequency domain resource; the network device sends a reference signal to the terminal device on the reference signal resource. In this way, the reference signal resources of the different cells for transmitting the reference signals can be aligned in the time domain and the frequency domain respectively, solving the problem of reference signal transmission based on different basic parameter sets.

Description

Method for transmitting reference signal, network device and terminal device

Embodiments of the present invention relate to the field of wireless communications, and, more particularly, to a method, network device, and terminal device for transmitting a reference signal.

In a wireless communication system, a Reference Signal ("RS") is a set of known signals transmitted by a transmitting device for use by a receiving device for channel estimation. For example, for a cell that supports Coordinated Multiple Points ("CoMP"), the terminal device can use a reference signal such as a Channel State Information RS (CSI-RS). The signal and interference intensity of each cell are measured and reported to the base station.

In a Long Term Evolution (LTE) system, CSI-RSs configured for terminal devices of different cells are aligned at time-frequency resource locations, that is, received by different terminal devices. The time-frequency resource occupied by the channel-measured CSI-RS is the same, so that the terminal device is not affected by the transmission of adjacent cell data during channel detection. However, the future 5G system can support a plurality of different basic parameter sets. When the terminal devices located in adjacent cells respectively use different basic parameter sets, different basic parameter sets may result in resource elements occupied by CSI-RS (Resource Element, referred to as "RE") cannot be aligned at the time-frequency position. If the CSI-RS is still configured in the manner of LTE, the terminal device will be interfered with by the neighbor cell data transmission in the channel measurement procedure.

The embodiment of the invention provides a method for transmitting a reference signal, a network device and a terminal device, which solves the problem of how to transmit a reference signal based on different basic parameter sets.

In a first aspect, a method for transmitting a reference signal is provided, comprising: determining, by a network device of a first cell, a first resource block corresponding to the first cell, and at least one second resource corresponding to the at least one second cell a block, wherein a time-frequency resource size of the first resource block is different from a time-frequency resource size of the at least one second resource block; the network device is in the first resource block and the at least one second resource block, Determining a resource block with the largest time domain resource and a resource block having the largest frequency domain resource; the network device determines the reference signal resource according to the resource block with the largest time domain resource and the resource block with the largest frequency domain resource; the network The device sends a reference signal to the terminal device on the reference signal resource.

Therefore, based on different basic parameter sets used by different cells, the reference signal resources for transmitting the reference signals are determined according to different resource blocks of different cells, so that different cells are used to transmit the reference signal resources of the reference signals in the time domain. It is aligned with the frequency domain, thus solving the problem of reference signal transmission based on different basic parameter sets.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to The size of the subcarrier spacing in the base parameter set used by the first cell; the time domain resource size of each second resource block in the at least one second resource block is equal to the basic parameter set used by the corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

For example, the first base parameter set used by the first cell has a subcarrier spacing of 15 kHz, the symbol length is 1/15 kHz or 66.67 us, the CP length is 4.687 us, and the second base parameter used in the second basic parameter set is used. The interval is 30 kHz, the symbol length is 1/30 kHz, that is, 33.33us, and the CP length is 2.344us. Therefore, the frequency of the first resource block (the shaded part in the left figure in Fig. 3) is 15 kHz, and the time domain resource size is 71.36. Us, and the frequency resource size of the second resource block (shaded in the right picture in Figure 3) is 30 kHz, and the time domain resource size is 35.68 us.

Optionally, the network device determines, according to the resource block with the largest time domain resource and the resource block with the largest frequency domain resource, the reference signal resource, including: the time when the network device maximizes the resource block of the time domain resource. The size of the domain resource is determined as the time domain resource size of the reference signal resource, and the frequency domain resource size of the resource block with the largest frequency domain resource is determined as the frequency domain resource size of the reference signal resource.

For example, the first base parameter set used by the first cell has a subcarrier spacing of 15 kHz, a symbol length of 66.67 us, a CP length of 4.687 uss, and a second base parameter set used by the second cell has a subcarrier spacing of 30 kHz. The symbol length is 33.33us and the CP length is 2.344us. The frequency domain resource size of the first resource block is 15 kHz, the time domain resource size is 71.36 us, the frequency resource size of the second resource block is 30 kHz, and the time domain resource size is 35.68 us. Therefore, the frequency domain resource size of the reference signal resource is 30 kHz, and the time domain resource size is 71.36 us. Alternatively, the frequency domain resource size of the reference signal may also be an even multiple of 30 kHz, for example, 60 kHz and/or the time domain resource size of the reference signal may also be an even multiple of 71.36 us, for example, 140 us.

Optionally, the method further includes: determining, by the network device, a resource parameter corresponding to the first resource block, where the resource parameter includes: a time domain resource size of the reference signal resource and a time domain resource size of the first resource block a ratio, and a ratio of a frequency domain resource size of the reference signal resource to a frequency domain resource size of the first resource block; the network device sends the resource parameter to the terminal device.

Optionally, the method further includes: sending, by the network device, the information of the time-frequency resource of the first resource block and/or the information of the time-frequency resource of the at least one second resource block to the terminal device.

Optionally, the method further includes: determining, by the network device, configuration information, where the configuration information includes a distribution period of the reference signal resource in a time domain and a distribution period of the reference signal resource in a frequency domain; The terminal device sends the configuration information.

Optionally, the reference signal includes at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS, and a demodulation reference signal DMRS.

The reference signal in the embodiment of the present invention can be used for transmission of a downlink reference signal such as a channel state information reference signal CSI-RS, a specific cell reference signal CRS, and a demodulation reference signal DMRS, and can also be used for uplink reference signals. For example, the transmission of the sounding reference signal SRS, the uplink DMRS, and the like.

Optionally, the reference signal includes a zero power reference signal or a non-zero power reference signal.

If the reference signal sent by the network device in a neighboring cell of the first cell to the terminal device 20 is a non-zero power reference signal, the terminal device 20 may measure the channel condition under the interference of the cell, if The reference signal transmitted by the network device of the cell to the terminal device 20 is a zero power reference signal, and the terminal device 20 can measure the channel condition without the cell interference.

Moreover, the interference between the multi-cells in the embodiment of the present invention further includes interference between different basic parameter sets, and the method for transmitting the reference signal according to the implementation of the present invention may also help the receiving end to estimate from different foundations. Interference between parameter sets.

Optionally, the method is applied to coordinate coordinated multi-point CoMP, the second cell being a cell adjacent to the first cell.

In a second aspect, a method for transmitting a reference signal is provided, the method includes: determining, by the terminal device, a first resource block corresponding to the first cell; the terminal device determining, according to the first resource block, a reference signal resource, where The time domain resource size of the reference signal resource is equal to the time domain resource size of the resource block with the largest time domain resource in the first resource block and the at least one second resource block, or the time domain of the resource block with the largest time domain resource. An even multiple of the resource size, the frequency domain resource size of the reference signal resource is equal to the frequency domain resource size of the resource block with the largest frequency domain resource in the first resource block and the at least one second resource block, or is equal to the maximum frequency resource of the frequency domain resource. An even multiple of a frequency domain resource size of the resource block, the at least one second resource block being a resource block corresponding to the at least one second cell; the terminal device receiving the network of the first cell on the reference signal resource The reference signal sent by the road device.

Therefore, based on different basic parameter sets used by different cells, the reference signal resources for transmitting the reference signals are determined according to different resource blocks of different cells, so that different cells are used to transmit the reference signal resources of the reference signals in the time domain. It is aligned with the frequency domain, thus solving the problem of reference signal transmission based on different basic parameter sets.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to The size of the subcarrier spacing in the base parameter set used by the first cell; the time domain resource size of each second resource block in the at least one second resource block is equal to the basic parameter set used by the corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

For example, the first base parameter set used by the first cell has a subcarrier spacing of 15 kHz, the symbol length is 1/15 kHz or 66.67 us, the CP length is 4.687 us, and the second base parameter used in the second basic parameter set is used. The interval is 30 kHz, the symbol length is 1/30 kHz, that is, 33.33us, and the CP length is 2.344us. Therefore, the frequency of the first resource block (the shaded part in the left figure in Fig. 3) is 15 kHz, and the time domain resource size is 71.36. Us, and the frequency resource size of the second resource block (shaded in the right picture in Figure 3) is 30 kHz, and the time domain resource size is 35.68 us.

Optionally, before the determining, by the terminal device, the reference signal resource according to the first resource block, the method further includes: receiving, by the terminal device, a resource parameter corresponding to the first resource block sent by the network device, the resource parameter The first ratio of the time domain resource size of the reference signal resource to the time domain resource size of the first resource block, and the frequency domain resource size of the reference resource resource and the frequency domain resource size of the first resource block And determining, by the terminal device, the reference signal resource according to the first resource block, where the terminal device determines the product of the time domain resource size of the first resource block and the first ratio as the reference signal resource. The size of the domain resource, and the product of the frequency domain resource size of the first resource block and the second ratio is determined as the frequency domain resource size of the reference signal resource.

For example, the frequency resource size of the first resource block is 15 kHz, the time domain resource size is 1/15 kHz, that is, 66.67 us, the CP length is 4.687 us, the frequency resource size of the second resource block is 30 kHz, and the time domain resource size is 1. /30kHz is 33.33us and the CP length is 2.344us. Assuming that the first ratio is M, the second ratio is N, and the frequency domain resource size of the reference signal resource determined by the network device 10 is 30 kHz, and the time domain resource size is 71.36 us, corresponding to the first resource block. In the resource parameter, M = 30 kHz / 15 kHz = 2, and N = 71.36 us / 71.36 us = 1. The resource parameter corresponding to the first resource block sent by the network device 10 to the terminal device 20 is M=2, N=1. After receiving the resource parameter sent by the network device 10, the terminal device 20 determines the reference signal resource according to the frequency domain resource size 15 kHz of the first resource block and the time domain resource size 71.36 us, and M=2 and N=1. The frequency domain resource size is 15 kHz × 2 = 30 kHz, and the time domain resource size is 71.36 us × 1 = 71.36 us. It should be understood that the resource parameter corresponding to the first resource block sent by the network device 10 to the terminal device 20 may also be M=4×n, N=2×m, etc., and both n and m are even numbers.

It should be understood that, in this embodiment, the resource parameter may further include: a difference between a time domain resource size of the reference signal resource and a time domain resource size of the first resource block, and a frequency domain of the reference signal resource. The difference between the resource size and the size of the frequency domain resource of the first resource block.

Alternatively, the resource parameter may further include other parameters that can clearly indicate the relationship between the time domain resource size of the reference signal resource and the time domain resource size of the first resource block, and a frequency domain that can clearly indicate the reference signal resource. A parameter of the relationship between the resource size and the frequency domain resource size of the first resource block.

Optionally, before the determining, by the terminal device, the first resource block corresponding to the first cell, the method further includes: receiving, by the terminal device, information about a time-frequency resource of the at least one second resource block sent by the network device; Determining, by the terminal device, the reference signal resource according to the first resource block, the terminal device determining, in the first resource block and the at least one second resource block, a time domain resource size of the resource block with the largest time domain resource, And a frequency domain resource size of the resource block with the largest frequency domain resource; the terminal device determines the time domain resource size of the resource block with the largest time domain resource as the time domain resource size of the reference signal resource, and the frequency domain The frequency domain resource size of the resource block with the largest resource is determined as the frequency domain resource size of the reference signal resource.

For example, if there are n cells adjacent to each other, corresponding to n basic parameter sets, at least two basic parameter sets are different in the n basic parameter sets, corresponding subcarrier spacing, and symbol length The sum of the lengths of the cyclic prefixes is (F1, T1), (F2, T2), ... (Fn, Tn), respectively. Then, for Mode 2 of 450, the frequency domain resource size and the time domain resource size of the reference signal resource determined by the terminal device 20 have the following relationship: F(CSI-RS)=Max(F1...Fn); T(CSI-RS) =Max(T1...Tn), where F(CSI-RS) is the frequency domain width of the reference signal resource; T(CSI-RS) is the time domain width of the reference signal resource. Max(x) represents the maximum of the listed parameters. With the above relationship, the network device 10 only needs to broadcast a list of time-frequency resource information of different resource blocks measured by the terminal device 20 at the edge of the cell, and the terminal device 20 can derive the time-frequency resource of the reference signal resource from the above relationship.

Optionally, the method further includes: receiving, by the terminal device, configuration information sent by the network device, where the configuration information includes a distribution period of the reference signal resource in a time domain and a distribution period of the reference signal resource in a frequency domain; The terminal device receives the reference signal sent by the network device on the reference signal resource, and the terminal device receives the reference sent by the network device on the plurality of periodically distributed reference signal resources according to the configuration information. Signal.

Optionally, the reference signal includes at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS, and a demodulation reference signal DMRS.

Optionally, the reference signal includes a zero power reference signal or a non-zero power reference signal.

Optionally, the method is applied to coordinate coordinated multi-point CoMP, the second cell being a cell adjacent to the first cell.

In a third aspect, a network device is provided, which can be used to execute the various programs executed by the network device in the method for transmitting a reference signal in the foregoing first aspect and various implementations of the first aspect. The network device includes a determining module and a sending module, the determining module is configured to: determine a first resource block corresponding to the first cell, and at least one second resource block corresponding to the at least one second cell, where The time-frequency resource size of the first resource block is different from the time-frequency resource size of the at least one second resource block; in the first resource block and the at least one second resource block, determining a resource with the largest time domain resource a block, and a resource block having the largest frequency domain resource; determining a reference signal resource according to the resource block having the largest time domain resource and the resource block having the largest frequency domain resource; and the sending module, configured to be on the reference signal resource, Sending a reference signal to the terminal device.

In a fourth aspect, a network device is provided, which can be used to execute various programs executed by a network device in the method for transmitting a reference signal in the foregoing first aspect and various implementations of the first aspect. The network device includes: a processor, configured to determine a first resource block corresponding to the first cell, and at least one second resource block corresponding to the at least one second cell, where a time frequency of the first resource block The resource size is different from the time-frequency resource size of the at least one second resource block; in the first resource block and the at least one second resource block, determining a resource block with the largest time domain resource and a resource with the largest frequency domain resource And the transceiver is configured to send the reference signal to the terminal device on the reference signal resource, according to the resource block with the largest time domain resource and the resource block with the largest frequency domain resource.

In a fifth aspect, a terminal device is provided, which can be used to execute various programs executed by a terminal device in a method for transmitting a reference signal in the foregoing second aspect and various implementations of the second aspect. The terminal device includes a determining module and a receiving module, the determining module is configured to: determine a first resource block corresponding to the first cell; and determine, according to the first resource block, a reference signal resource, where the reference signal resource The time domain resource size is equal to the time domain resource size of the resource block with the largest time domain resource in the first resource block and the at least one second resource block, or an even multiple of the time domain resource size of the resource block with the largest time domain resource. The frequency domain resource size of the reference signal resource is equal to the frequency domain resource size of the resource block with the largest frequency domain resource in the first resource block and the at least one second resource block, or the frequency of the resource block with the largest resource resource in the frequency domain. An even multiple of the size of the domain resource, the at least one second resource block is a resource block corresponding to the at least one second cell; the sending module is configured to receive the network of the first cell on the reference signal resource The reference signal sent by the device.

In a sixth aspect, a terminal device is provided, which can be used to execute various programs executed by a terminal device in a method for transmitting a reference signal in the foregoing second aspect and various implementations of the second aspect. The terminal device includes: a processor, configured to determine a first resource block corresponding to the first cell; and, according to the first resource block, a reference signal resource, where a time domain resource size of the reference signal resource is equal to the first The time domain resource size of the resource block and the resource block of the at least one second resource block having the largest time domain resource, or an even multiple of the time domain resource size of the resource block having the largest time domain resource, and the frequency domain resource of the reference signal resource a size equal to a frequency domain resource size of the resource block having the largest frequency domain resource in the first resource block and the at least one second resource block, or an even multiple of a frequency domain resource size equal to the resource block having the largest frequency domain resource, where the at least A second resource block is a resource block corresponding to the at least one second cell; the transceiver is configured to receive, on the reference signal resource, a reference signal sent by the network device of the first cell.

In a seventh aspect, a computer readable storage medium is provided, the computer readable storage medium storing a program that causes the network device to perform the first aspect described above, and any of the various implementations of the first aspect The method of transferring data.

In an eighth aspect, a computer readable storage medium is provided, the computer readable storage medium storing a program that causes the terminal device to perform the second aspect described above, and any of the various implementations of the second aspect for transmission Method of data.

According to the method of the embodiment of the present invention, based on different basic parameter sets used by different cells, the reference signal resources for transmitting the reference signals are determined according to different resource blocks of different cells, so that different cells are used for transmitting reference signals. The signal resources are aligned in the time domain and the frequency domain respectively, thereby solving the problem of reference signal transmission based on different basic parameter sets.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as: Global System of Mobile communication ("GSM"), Code Division Multiple Access (CDMA). ") System, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service ("GPRS"), Long Term Evolution (LTE) ") System, Universal Mobile Telecommunication System (UMTS), and other current communication systems, and especially for future 5G systems.

The terminal device in the embodiment of the present invention may also be referred to as a User Equipment ("UE"), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, and a remote terminal. , mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal may be a cellular phone, a wireless phone, a Session Initiation Protocol ("SIP") phone, a Wireless Local Loop (WLL) station, or a Personal Digital Assistant (Personal Digital Assistant). "PDA"), a handheld device with wireless communication capabilities, a computer device or other processing device connected to a wireless data device, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a future evolved public land mobile communication network (Public Land Mobile Network, abbreviated as "PLMN") terminal device or the like.

The network device in the embodiment of the present invention may be a device for communicating with a terminal device, and the network device may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a WCDMA system. The base station (NodeB, referred to as "NB") may also be an evolved base station (Evolutional NodeB, "eNB or eNodeB") in the LTE system, or may be a Cloud Radio Access Network (Cloud Radio Access Network). The wireless controller in the scenario of "CRAN" for short, or the network device can be a relay station, an access point, an in-vehicle device, a wearable device, and a network device in a future 5G network or in a future evolved PLMN network. Network devices, etc.

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present invention. The scenario shown in FIG. 1 may be a Coordinated Multiple Points ("CoMP") system. As shown in FIG. 1, the field includes a network device 10, a terminal device 20 at the edge of the network device 10 covering the cell, a network device 30, and a terminal device 40 located within the cell of the network device 30. Wherein, the coverage cell of the network device 10 is the first cell, the coverage cell of the network device 30 is the second cell, the terminal device 20 at the edge of the first cell and the terminal device 40 in the second cell, The base parameter set used when transferring data can be different. The network device 10 and the terminal device 20 will be described below as an example. The terminal device 20 can simultaneously receive the reference signals sent by the network device 10 and the network device 30, and perform channel detection according to the received reference signals. For example, the terminal device 20 can detect the channel condition under the interference of the second cell or detect the channel condition without the interference of the second cell.

It should be noted that the example of FIG. 1 is only intended to assist those skilled in the art to better understand the embodiments of the present invention, and not to limit the scope of the embodiments of the present invention. For example, although only two network devices and one terminal device are described in FIG. 1, the number of network devices and terminal devices in the embodiment of the present invention is not limited thereto, and each network device may have a cell coverage area. A larger number of terminal devices may also have a greater number of network devices providing data services for the same terminal device. For example, the method in the embodiment of the present invention may be used to coordinate the multi-point transmission of the CoMP communication, and may also be used in any other communication system, which is not limited by the present invention. The following is just an example of CoMP communication, and is described in conjunction with FIG.

In the LTE system, there are three downlink reference signals, namely, Cell Specific RS (CRS), Channel State Information RS (CSI-RS), and demodulation. Reference signal (Demodulation RS, referred to as "DMRS"). The CRS and the CSI-RS are common reference signals broadcast in the cell, and the main purpose thereof is for the terminal device to estimate the channel state ("CSI"). In an LTE system, a terminal device can report channel conditions to a network device periodically or aperiodically based on CRS or CSI-RS measurement channel conditions.

Taking CSI-RS as an example, for example, for a cell supporting CoMP, the terminal device will measure the signal and interference strength of each cell by using CSI-RS, and report it to the network device. When the terminal device is located at the edge of the cell, the network device configures the terminal device with a non-zero-power CSI-RS and a zero-power CSI-RS to make The terminal device can accurately measure signal interference from different cells. Fig. 2(a) and Fig. 2(b) are schematic diagrams showing channel detection based on CSI-RS when there is cell interference, and in the case of configuring CSI-RS according to Fig. 2(a), the first cell The terminal device is capable of measuring the channel condition of the first cell under the interference of the third cell, and the terminal device of the second cell is capable of measuring the interference of the first cell and the third cell at the zero-power CSI-RS The channel condition, the terminal device of the third cell is capable of measuring the channel condition under the interference of the first cell. In the case where the CSI-RS is configured according to the second (b) diagram, the terminal device of the first cell can measure the channel condition of the first cell in the absence of adjacent cell interference, the second cell and the third cell. The terminal is capable of measuring the channel condition under interference of the first cell at the zero power CSI-RS.

In the LTE system, the CSI-RSs configured for the terminal devices of different cells are aligned at the time-frequency position, and the terminal device is not affected by the transmission of adjacent cell data when detecting the channel state. In the future, 5G systems can support a variety of different basic parameter sets. When the terminal devices located in adjacent cells use different basic parameter sets, different basic parameter sets will result in resource elements occupied by CSI-RS (Resource Element, referred to as “Resource Element”. RE") cannot be aligned at the time-frequency position. For example, as shown in Figure 3, Figure 3 shows the effect on the reference signal transmission when there are different basic parameter sets. Taking the sub-carrier spacing as an example, it can be seen that The subcarrier spacing in the basic parameter set used by the terminal device of one cell is 15 kHz, and the subcarrier spacing in the basic parameter set used by the terminal device of the second cell is 30 kHz, if the CSI-RS is still configured according to the manner in the LTE system. This can cause the terminal device to be interfered with by the transmission of neighboring cell data in the program for measuring the state of the cell channel.

In the embodiment of the present invention, the network device configures time-frequency resources for transmitting the reference signal according to the basic parameter set used by the terminal device, so that the terminal device is not subject to data transmission based on other basic parameter sets when receiving the reference signal. influences.

It should be understood that adjacent cells in the embodiments of the present invention refer to partial overlap between the coverage of each cell in different cells, or a certain distance between different cells but still sufficient for other The signal transmission of the cell causes interference, which is not limited by the present invention. Moreover, the method according to the embodiment of the present invention can be used in any communication scenario, and the cell participating in the reference signal transmission can be any cell. In particular, when applied to CoMP transmission, different cells participating in the reference signal transmission may be adjacent cells.

FIG. 4 is a flow diagram of a process for transmitting a reference signal according to an embodiment of the present invention. The network device 10 and the terminal device 20 of the first cell are shown in FIG. As shown in FIG. 4, the specific process of transmitting the reference signal includes: 410. The network device 10 of the first cell determines a first resource block corresponding to the first cell, and at least one corresponding to the at least one second cell. The second resource block.

The second cell is a cell adjacent to the first cell, and the time-frequency resource size of the first resource block is different from the time-frequency resource size of the at least one second resource block.

Specifically, in a 5G system, Resource Blocks (REs) of different cells may be different, and at least some of the cells of the cells adjacent to the first cell are resource blocks. Unlike the resource block of the first cell, the at least one second cell is a cell different from the resource block of the first cell. In the embodiment of the present invention, only the first cell and the at least one second cell are taken as an example. For the case where the resource block of the first cell and the resource block of the adjacent cell are the same, the present invention may be implemented according to the present invention. The method described in the example is implemented or implemented according to the method in the prior art, which is not limited by the present invention.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to a size of a subcarrier spacing in a base parameter set used by the first cell; a time domain resource size of each second resource block in the at least one second resource block, equal to a base parameter set used by each corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

For example, as shown in FIG. 1, only the first cell and any one of the at least one second cell are shown in FIG. 1, and the terminal device 20 may be a terminal device located at the edge of the first cell. The second cell is a cell adjacent to the first cell, and the terminal device 20 can simultaneously receive the reference signal sent by the network device 10 of the first cell and the network device 30 of the second cell, and Channel detection is performed based on the received reference signal. The basic parameter set for transmitting data configured by the first cell is a first basic parameter set, and the basic parameter set configured for transmitting data by the second cell is a second basic parameter set, and the first basic parameter The set is different from the second base parameter set. Further, the first basic parameter set and the second basic parameter set respectively include a subcarrier spacing, or a symbol length and a cyclic prefix length, and at least one of the three parameters is different.

Specifically, the terminal device located in the first cell may use the first basic parameter set in the program for data interaction with the network device 10, according to parameters in the first basic parameter set, such as subcarrier spacing, or symbol length. The data is transmitted by the length of the Cyclic Prefix ("CP"). The basic parameter set used by the terminal device 40 located at the second cell to perform data transmission with the network device 30 may be the second basic parameter set. The second basic parameter set may be a different basic parameter set than the first basic parameter set, such as a difference between a symbol length and a cyclic prefix CP length, and/or a subcarrier spacing. Therefore, the first resource block of the first cell using the first basic parameter set and the second resource block of the second cell using the second basic parameter set may be different resource blocks, and the time-frequency resource of the first resource block The size is not equal to the time-frequency resource size of the second resource block. For example, as shown in FIG. 3, the subcarrier spacing in the first basic parameter set is 15 kHz, the symbol length is 1/15 kHz or 66.67 us, the CP length is 4.687 us, and the subcarrier spacing in the second basic parameter set is 30 kHz, and the symbol length is 1/30 kHz is 33.33us, and the CP length is 2.344us, so the first resource block of the cell using the first basic parameter set (shaded portion of the left picture in FIG. 3) has a frequency domain resource size of 15 kHz, and the time domain resource The size is 71.36us, and the second resource block of the cell using the second basic parameter set (shaded portion of the right picture in FIG. 3) has a frequency domain resource size of 30 kHz and a time domain resource size of 35.68 us.

420. The network device 10 determines, in the first resource block and the at least one second resource block, a resource block with the largest time domain resource and a resource block with the largest frequency domain resource.

Specifically, the network device 10 may determine, in the first resource block and the at least one second resource block, a resource block with the largest time domain resource and a resource block with the largest frequency domain resource, so as to be able to be the largest according to the time domain resource. The resource block and the largest resource block of the frequency domain resource are used to determine the reference signal resource.

430. The network device 10 determines the reference signal resource according to the resource block with the largest time domain resource and the resource block with the largest frequency domain resource.

Specifically, the network device 10 determines, in the first resource block and the at least one second resource block, a resource block with the largest time domain resource and a resource block with the largest frequency domain resource, and the largest resource according to the time domain resource. The resource block and the resource block with the largest frequency domain resource determine the reference signal resource used for transmitting the reference signal.

The time domain resource size of the reference signal resource may be equal to the time domain resource size of the resource block with the largest time domain resource in the first resource block and the at least one second resource block, or the resource block with the largest time domain resource. An even multiple of the size of the time domain resource; the frequency domain resource size of the reference signal resource may be equal to the frequency domain resource size of the resource block with the largest frequency domain resource in the first resource block and the at least one second resource block, or equal to the frequency domain An even multiple of the frequency domain resource size of the resource block with the largest resource, the at least one second resource block being a resource block corresponding to the at least one second cell.

Optionally, the network device determines, according to the resource block with the largest time domain resource and the resource block with the largest frequency domain resource, the reference signal resource, including: the time when the network device maximizes the resource block of the time domain resource. The size of the domain resource is determined as the time domain resource size of the reference signal resource, and the frequency domain resource size of the resource block with the largest frequency domain resource is determined as the frequency domain resource size of the reference signal resource.

Specifically, if the time domain resource of the first resource block is larger in the first resource block and the at least one second resource block, the time domain resource size of the reference signal resource is equal to the time domain resource of the first resource block. a size, or equal to an even multiple of a time domain resource size of the first resource block; if in the first resource block and the at least one second resource block, a time domain of a second resource block of the at least one second resource block If the resource is the largest, the time domain resource size of the reference signal resource is equal to the time domain resource size of the second resource block with the largest time domain resource, or an even multiple of the time domain resource size of the second resource block with the largest time domain resource. Similarly, if the frequency resource of the first resource block is larger in the first resource block and the at least one second resource block, the frequency domain resource size of the reference signal resource is equal to the frequency domain resource size of the first resource block. Or equal to an even multiple of the frequency domain resource size of the first resource block; if the first resource block and the at least one second resource block are at least one of the second resource blocks If the domain resource is large, the frequency domain resource size of the reference signal resource is equal to the frequency domain resource size of the second resource block with the largest frequency domain resource, or is equal to the frequency domain resource size of the second resource block with the largest frequency domain resource. Even multiples.

For example, FIG. 5 is a schematic diagram showing reference signal resources based on different basic parameter sets according to an embodiment of the present invention. Only the reference signal resource of the first cell and any one of the at least one cell is shown in FIG. The first cell uses the first basic parameter set for data transmission, and the second cell uses the second basic parameter set for data transmission. The sub-carrier spacing of the first basic parameter set is 15 kHz, the symbol length is 66.67 us, the CP length is 4.687 us, the sub-carrier spacing of the second basic parameter set is 30 kHz, the symbol length is 33.33 us, and the CP length is 2.344 us. The frequency domain resource size of the first resource block determined by the network device 10 according to the first basic parameter set is 15 kHz, the time domain resource size is 71.36 us, and the frequency domain resource of the second resource block determined according to the second basic parameter set. The size is 30 kHz and the time domain resource size is 35.68 us. It can be seen that the frequency domain resource size of the second resource block is greater than the frequency domain resource size of the first resource block, and thus the frequency domain resource size of the reference signal resource is equal to the frequency domain resource size of the second resource block. The time domain resource size of the first resource block is greater than the time domain resource size of the second resource block. Therefore, the time domain resource size of the reference signal resource is equal to the time domain resource size of the first resource block. As shown in Figure 5, the frequency domain resource size of the reference signal resource is 30 kHz, and the time domain resource size is 71.36 us. Alternatively, the frequency domain resource size of the reference signal may also be an even multiple of 30 kHz, for example, 60 kHz and/or the time domain resource size of the reference signal may also be an even multiple of 71.36 us, for example, 142.72 us.

In other words, the time-frequency resource size of the reference signal resource should be equal to the time-frequency resource size of the at least one first resource block, and equal to the time-frequency resource size of the at least one second resource block, so that the first cell is used. The reference signal resource for transmitting the reference signal is the same as the reference signal resource for transmitting the reference signal in the second cell, that is, it can be aligned in the time-frequency domain.

It should be understood that the sum of the symbol length and the cyclic prefix length herein is for the symbol length and the cyclic prefix in the same basic parameter set, and the ratio of the CP length in the different basic parameter sets to the symbol length in the basic parameter set may be fixed. For example, the length of the CP in the basic parameter set may be about 7% of the symbol length, and when the symbol length of the first basic parameter set is 66.67, the CP length is 4.687, and the time domain of the first resource block corresponding to the first basic parameter set. The resource size is 71.36us; when the symbol length of the second basic parameter set is 33.33, the CP length is 2.344us, and the time domain resource size of the second resource block corresponding to the second basic parameter set is 35.68us. Of course, the ratio of the length of the CP in different basic parameter sets to the symbol length in the basic parameter set can also be determined according to the specific situation, as long as the requirement of the sub-frame length of 1 ms is satisfied.

It should also be understood that the description herein is directed to any one of the second cells that interfere with the first cell shown in FIG. 1, but the method of the embodiment of the present invention can be used between multiple cells. Reference signal transmission. For example, if there are first cells, second cells, and third cells adjacent to each other, then in 430, the network device 10 will respectively correspond to the three resources corresponding to the three cells. The time domain resource size of the resource block with the largest time domain resource in the block is determined as the time domain resource size of the reference signal resource, and the frequency domain resource size of the resource block with the largest frequency domain resource among the three resource blocks is Determine the size of the frequency domain resource for the reference signal resource. Therefore, the network devices of the three cells can simultaneously transmit reference signals to the terminal device 20 on the reference signal resource, so that the terminal device 20 can measure the current channel status according to the reference signals.

440. The network device 10 sends a reference signal to the terminal device 20 on the reference signal resource.

After the network device determines the reference signal resource, the reference signal is sent to the terminal device 20 on the reference resource. At the same time, the network device of other cells, for example, the network device 30 of the second cell, may also send a reference signal to the terminal device 20. For the cell supporting CoMP, the second cell may be the first cell. The neighboring cell 20 can simultaneously receive the reference signals transmitted by the network device 10 and the network device 30, so that the terminal device 20 will use the reference signal to measure the reference signal and interference strength from each cell. For example, as shown in FIG. 5, the terminal device 20 at the edge of the first cell can measure the channel condition under the interference of the second cell.

In order to receive the reference signal sent by the network device 10, the terminal device 20 also needs to determine the reference signal resource for receiving the reference signal.

450. The terminal device 20 determines a first resource block corresponding to the first cell.

The time-frequency resource of the first resource block is different from the time-frequency resource size of the at least one second resource block, and the at least one second resource block is at least one second basic parameter set used by the at least one second cell. Corresponding resource blocks.

Taking FIG. 1 as an example, the terminal device 20 located in the first cell may use the first basic parameter set in the program for data interaction with the network device 10, according to parameters in the first basic parameter set, such as subcarrier spacing. Data transmission, symbol length and CP length. The basic parameter set used by the terminal device 40 located at the second cell to perform data transmission with the network device 30 at this time may be the second basic parameter set. The second basic parameter set may be a different basic parameter set than the first basic parameter set, such as a difference between a symbol length and a cyclic prefix CP length, and/or a subcarrier spacing. Therefore, the first resource block of the first cell using the first basic parameter set and the second resource block of the second cell using the second basic parameter set may be different resource blocks, and the time-frequency resource of the first resource block The size is not equal to the time-frequency resource size of the second resource block. For example, as shown in FIG. 3, the subcarrier spacing in the first basic parameter set is 15 kHz, the symbol length is 1/15 kHz or 66.67 us, the CP length is 4.687 us, and the subcarrier spacing in the second basic parameter set is 30 kHz, and the symbol length is 1/30 kHz is 33.33us, and the CP length is 2.344us, so the first resource block of the cell using the first basic parameter set (shaded portion of the left picture in FIG. 3) has a frequency domain resource size of 15 kHz, and the time domain resource The size is 71.36us, and the second resource block of the cell using the second basic parameter set (shaded portion of the right picture in FIG. 3) has a frequency domain resource size of 30 kHz and a time domain resource size of 35.68 us.

Optionally, in 450, the first resource block determined by the terminal device 20 may be that the network device 10 sends the information of the time-frequency resource of the first resource block to the terminal device 20, so that the terminal device 20 acquires the first resource. The information of the time-frequency resource of the block, and determining the reference signal resource according to the information of the time-frequency resource; or the terminal device 20 itself determines the first resource block according to the first basic parameter set.

460. The terminal device 20 determines the reference signal resource according to the first resource block.

The time domain resource size of the reference signal resource is equal to the time domain resource size of the resource block with the largest time domain resource in the first resource block and the at least one second resource block, or the resource block equal to the largest time domain resource. The frequency domain resource size of the reference signal resource is equal to the frequency domain resource size of the resource block with the largest frequency domain resource in the first resource block and the at least one second resource block, or is equal to the frequency domain. An even multiple of the frequency domain resource size of the resource block with the largest resource, the at least one second resource block being a resource block corresponding to the at least one second cell.

In 460, the terminal device 20 determines the reference signal resource, which can be specifically described in the following two manners, which will be specifically described below in conjunction with FIGS. 6 and 7.

Mode 1

The network device 10 indicates the resource parameter corresponding to the first resource block to the terminal device 20, so that the terminal device 20 can directly learn the reference signal resource according to the resource parameter. A process interaction diagram for determining a reference signal according to an embodiment of the present invention as shown in FIG. 6. Before the terminal device 20 determines the reference signal resource, ie, 460, according to the first resource block, the method further includes 461 to 463.

461. The network device 10 determines resource parameters corresponding to the first resource block.

The resource parameter includes: a first ratio of a time domain resource size of the reference signal resource to a time domain resource size of the first resource block, and a frequency domain resource size of the reference signal resource and a frequency of the first resource block. The second ratio of the size of the domain resource.

Or the resource parameter includes: a difference between a time domain resource size of the reference signal resource and a time domain resource size of the first resource block, and a frequency domain resource size of the reference signal resource and the first resource block. The difference between the frequency domain resource sizes.

Alternatively, the resource parameter may further include other parameters that can clearly indicate the relationship between the time domain resource size of the reference signal resource and the time domain resource size of the first resource block, and a frequency domain that can clearly indicate the reference signal resource. A parameter of the relationship between the resource size and the frequency domain resource size of the first resource block.

462. The network device 10 sends the resource parameter to the terminal device 20.

463. The terminal device 20 receives the resource parameter sent by the network device 10.

At this time, 460 can be replaced by 464.

464. The terminal device 20 determines the reference signal resource according to the first resource block and the resource parameter.

The terminal device 20 may determine the product of the time domain resource size of the first resource block and the first ratio as the time domain of the reference signal resource, where the resource parameter includes the first ratio and the second ratio. The size of the resource, and the product of the frequency domain resource size of the first resource block and the second ratio is determined as the frequency domain resource size of the reference signal resource.

That is, the terminal device 20 multiplies the time domain resource size of the first resource block by the first ratio in the resource parameter, and the obtained result is the time domain resource size of the reference signal resource; the terminal device 20 The frequency domain resource size of the first resource block is multiplied by the second ratio in the resource parameter, and the obtained result is used as the frequency domain resource size of the reference signal resource.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to The size of the subcarrier spacing in the base parameter set used by the first cell; the time domain resource size of each second resource block in the at least one second resource block is equal to the basic parameter set used by the corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

Taking FIG. 5 as an example, the frequency domain resource size of the first resource block is 15 kHz, the time domain resource size is 1/15 kHz, that is, 66.67 us, the CP length is 4.687 uss, and the frequency resource size of the second resource block is 30 kHz. The time domain resource size is 1/30 kHz or 33.33 us, and the CP length is 2.344 us. Assume that the first ratio of the time domain resource size of the reference signal resource to the time domain resource size of the first resource block is M, and the frequency domain resource size of the reference signal resource and the frequency domain resource size of the second resource block are The second ratio is N. Assuming that the frequency domain resource size of the reference signal resource determined by the network device 10 is 30 kHz and the time domain resource size is 1/15 kHz or 71.36 us, the M=30 kHz in the resource parameter corresponding to the first resource block is assumed. /15 kHz = 2, N = 71.36 us / 71.36 us = 1.

Therefore, the resource parameter corresponding to the first resource block sent by the network device 10 to the terminal device 20 is M=2, N=1. After receiving the resource parameter sent by the network device 10, the terminal device 20 determines the reference signal resource according to the frequency domain resource size 15 kHz of the first resource block and the time domain resource size 71.36 us, and M=2 and N=1. The frequency domain resource size is 15 kHz × 2 = 30 kHz, and the time domain resource size is 71.36 us × 1 = 71.36 us. It should be understood that the resource parameter corresponding to the first resource block sent by the network device 10 to the terminal device 20 may also be M=4×n, N=2×m, etc., and both n and m are even numbers.

As can be seen from FIG. 5, since the time-frequency resource of the first resource block and the time-frequency resource of the second resource block are different, the resource parameter corresponding to the first resource block and the resource parameter corresponding to the second resource block are different. The resource parameter corresponding to a resource block is M=2, N=1, and the resource parameter corresponding to the second resource block is M=1, N=2.

Mode 2

The terminal device 20 determines another way of referring to the signal resource, that is, the terminal device 20 determines the reference signal resource by itself according to the first resource block and the at least one second resource block. A process interaction diagram for determining a reference signal according to another embodiment of the present invention as shown in FIG. 7.

Before the terminal device 20 determines the reference signal resource according to the first resource block, the method further includes: 465. The terminal device 20 receives the information of the time-frequency resource of the at least one second resource block sent by the network device 10.

At this time, 460 includes 465 and 466, that is, 460 can be replaced by 465 and 466.

465. The terminal device 20 determines, in the first resource block and the at least one second resource block, a time domain resource size of the resource block with the largest time domain resource, and a frequency domain resource size of the resource block with the largest frequency domain resource.

466. The terminal device 20 determines the time domain resource size of the resource block with the largest time domain resource as the time domain resource size of the reference signal resource, and determines the frequency domain resource size of the resource block with the largest frequency domain resource as The size of the frequency domain resource of the reference signal resource.

Specifically, the terminal device 20 may acquire information about time-frequency resources of the first resource block and information of time-frequency resources of the at least one second resource block, and determine the reference signal resource according to the information of the time-frequency resources. The information of the time-frequency resource of the first resource block may include time domain resource information and/or frequency domain resource information of the first resource block, and the information of the time-frequency resource of the at least one second resource block may include at least one second resource. Time domain resource information and/or frequency domain resource information of each second resource block in the block. The terminal device 20 may determine the reference signal resource according to the information of the time-frequency resource of the first resource block and the information of the time-frequency resource of the at least one second resource block.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to The size of the subcarrier spacing in the base parameter set used by the first cell; the time domain resource size of each second resource block in the at least one second resource block is equal to the basic parameter set used by the corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

For example, the time domain resource size of the first resource block is different from the time domain resource size of the second resource block, and the terminal device 20 acquires the information of the time domain resource of the first resource block, and then the first resource block The time domain resource size is compared with the time domain resource size of the second resource block, and the time domain resource size of the resource block in which the time domain resource is larger is determined as the time domain resource size of the reference signal resource. At the same time, after acquiring the information of the frequency domain resource of the first resource block, the terminal device 20 compares the frequency domain resource size of the first resource block with the frequency domain resource size of the second resource block, and the frequency domain resource is larger. The frequency domain resource size of the resource block is determined as the frequency domain resource size of the reference signal resource. For example, as shown in FIG. 5, the frequency domain resource size of the first resource block is 15 kHz, the time domain resource size is 71.36 us, the frequency domain resource size of the second resource block is 30 kHz, and the time domain resource size is 35.68 us. Then, the frequency domain resource size of the reference signal resource determined by the terminal device 20 is 30 kHz, and the time domain resource size is 71.36 us. Of course, the frequency domain resource size of the reference signal resource may be n×30 kHz, and the time domain resource size is m×71.36 us, and both n and m are even numbers, which are not limited in the embodiment of the present invention, as long as different cell transmissions are satisfied. The reference signal resource used by the reference signal can be used at the time and frequency.

In mode 2, the terminal device 20 may receive time-frequency resource information of the resource block of the corresponding cell from the network device of each of the at least one second cell, or the first cell The network device 10 can learn the time-frequency resource information of the resource blocks of other cells, and send the time-frequency resource information of the first resource block and the at least one second resource block to the terminal device 20, where the terminal device 20 receives the plurality of resource blocks. After the time-frequency resource information, the time domain resource size of the resource block with the largest time domain resource may be selected as the time domain resource size of the reference signal resource in the complex resource block, and the frequency domain resource size of the resource block with the largest frequency domain resource may be selected. The size of the time domain resource as the reference signal resource.

For example, if there are n cells adjacent to each other, corresponding to n basic parameter sets, at least two basic parameter sets are different in the n basic parameter sets, corresponding subcarrier spacing, and symbol length The sum of the lengths of the cyclic prefixes is (F1, T1), (F2, T2), ... (Fn, Tn), respectively. Then, for Mode 2 of 450, the frequency domain resource size and the time domain resource size of the reference signal resource determined by the terminal device 20 have the following relationship: F(CSI-RS)=Max(F1...Fn); T(CSI-RS) =Max(T1...Tn), where F(CSI-RS) is the frequency domain width of the reference signal resource; T(CSI-RS) is the time domain width of the reference signal resource. Max(x) represents the maximum of the listed parameters. With the above relationship, the network device 10 only needs to broadcast a list of time-frequency resource information of different resource blocks measured by the terminal device 20 at the edge of the cell, and the terminal device 20 can derive the time-frequency resource of the reference signal resource from the above relationship.

It should be understood that, in the manner in which the terminal device 20 determines the reference signal resource, in addition to the foregoing manner 1 or mode 2, the network device 10 may send the resource information of the reference signal resource that the network device 10 has determined to the terminal device 20. After receiving the resource information of the reference signal resource sent by the network device 10, the terminal device 20 can directly receive the reference signal sent by the network device 10 on the time-frequency resource indicated by the resource information.

It should also be understood that, in the embodiment of the present invention, before the terminal device 20 determines the first resource block, the network device 10 may use the first basic parameter set used by the first cell and the at least one used by the at least one second cell. The information of the second basic parameter set is sent to the terminal device 20, so that the terminal device 20 determines the first resource block according to the first basic parameter set and the at least one second basic parameter set.

Of course, the network device 10 can also broadcast to the terminal device 20 a list of different basic parameter sets used by the plurality of cells, so that the terminal device 20 sets the maximum subcarrier spacing or an even multiple of the maximum subcarrier spacing in the plurality of basic parameter sets. Determine the frequency domain resource size of the reference signal resource, and determine the maximum value of the sum of the symbol length and the cyclic prefix length, or an even multiple of the maximum value of the sum of the symbol length and the cyclic prefix length, as the time domain of the reference signal resource. The size of the resource.

After the terminal device 20 determines the reference signal resource according to the two methods in 460, the terminal device 20 executes 470.

In 470, the terminal device 20 receives the reference signal sent by the network device 10 on the reference signal resource.

At the same time, the network device of the other cell, for example, the network device 30 of the second cell shown in FIG. 1 can also send a reference signal to the terminal device 20, and the terminal device 20 can simultaneously receive the network device 10 at the same time. And the reference signal sent by the network device 30, so that the terminal device 20 will use the two reference signals to measure the channel condition. As shown in Fig. 5, the terminal device 20 at the edge of the first cell can measure the channel condition under the interference of the second cell.

The reference signal in the embodiment of the present invention may include a zero power reference signal or a non-zero power reference signal.

If the reference signal received by the terminal device 20 from the network device 10 is a non-zero power reference signal, and the reference signal received by the terminal device 20 from the network device 30 is also a non-zero power reference signal, then the terminal device 20 of the first cell Channel conditions can be measured in the presence of second cell interference. If the reference signal received by the terminal device 20 from the network device 10 is a non-zero power reference signal, and the reference signal received by the terminal device 20 from the network device 30 is a zero power reference signal, the terminal device 20 of the first cell can measure In the case of a channel without interference from the second cell.

According to the method of the embodiment of the present invention, based on different basic parameter sets used by different cells, the reference signal resources for transmitting the reference signals are determined according to different resource blocks of different cells, so that different cells are used for transmitting reference signals. The signal resources are aligned in the time domain and the frequency domain respectively, thereby solving the problem of reference signal transmission based on different basic parameter sets.

It should be understood that the embodiment of the present invention is described by taking reference signal transmission between the network device 10 and the terminal device 20 as an example. And the cell that interferes with the terminal device 20 of the first cell only shows the second cell. However, the method for transmitting a reference signal in the embodiment of the present invention can be applied between multiple cells, and the network device and the terminal device of each cell can determine the reference signal resource according to the method implemented by the present invention. The reference signal is transmitted on the reference signal transmission resource.

Moreover, if the reference signal transmitted by the network device in a neighboring cell of the first cell to the terminal device 20 is a non-zero power reference signal, the terminal device 20 can measure the channel condition under the interference of the cell. If the reference signal transmitted by the network device of the cell to the terminal device 20 is a zero power reference signal, the terminal device 20 can measure the channel condition without the cell interference.

The terminal device 20 can also measure the channel status under the common interference of the plurality of cells by receiving a plurality of reference signals of non-zero power.

Optionally, the method further includes: the network device 10 determines configuration information, where the configuration information includes a distribution period of the reference signal resource in a time domain and a distribution period of the reference signal resource in a frequency domain; The terminal device 20 transmits the configuration information.

At this time, the terminal device 20 receives the reference signal sent by the network device 10 on the reference signal resource, and the terminal device 20 sends the received network device 10 on the plurality of reference signal resources distributed periodically according to the configuration information. The reference signal.

It should be understood that the distribution period of the reference signal resource in the time domain may also be referred to as the density of the reference signal in the time domain, and the distribution period of the reference signal resource in the frequency domain may also be referred to as the reference signal in the frequency domain. Density. For example, the reference signal resources shown in the 2 (a), 2 (b), and 3 are distributed in a frequency domain according to a certain period, and the distribution period of the reference signal in the frequency domain is equal to four resource blocks. The frequency domain resource size, that is, the reference signal is sent every three resource blocks in the frequency domain. It is also possible to specify that the reference signal is sent on some fixed subframes.

It should be understood that the reference signal in the embodiment of the present invention can be used for transmission of a downlink reference signal such as a channel state information reference signal CSI-RS, a specific cell reference signal CRS, and a demodulation reference signal DMRS, and can also be used for Chain reference signals such as sounding reference signals SRS, uplink DMRS, etc.

Moreover, the interference between the multi-cells in the embodiment of the present invention further includes interference between different basic parameter sets, and the method for transmitting the reference signal according to the implementation of the present invention may also help the receiving end to estimate from different foundations. Interference between parameter sets.

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above-mentioned respective programs does not mean the order of execution order, and the order of execution of each program should be determined by its function and internal logic, and should not be taken by the embodiment of the present invention. The implementation process constitutes any qualifications.

The method of transmitting data according to an embodiment of the present invention has been described in detail above, and a network device and a terminal device according to an embodiment of the present invention will be described below. It should be understood that the network device and the terminal device in the embodiments of the present invention may perform various methods in the foregoing embodiments of the present invention, that is, the specific working procedures of the following various devices, and may refer to the corresponding programs in the foregoing method embodiments.

Figure 8 shows a schematic block diagram of a network device 800 in accordance with an embodiment of the present invention. As shown in FIG. 8, the network device 800 includes a determination module 801 and a transmission module 802. The determining module 801 is configured to: determine a first resource block corresponding to the first cell, and at least one second resource block corresponding to the at least one second cell, a time-frequency resource size of the first resource block, and the at least a second resource block having a different time-frequency resource size; in the first resource block and the at least one second resource block, determining a resource block having the largest time domain resource and a resource block having the largest frequency domain resource; according to the time domain The resource block with the largest resource and the resource block with the largest resource in the frequency domain determine the reference signal resource. The sending module 802 is configured to send the reference signal to the terminal device on the reference signal resource.

Therefore, the network device determines, according to different basic parameter sets used by different cells, the reference signal resources used for transmitting the reference signals according to different resource blocks of different cells, so that different cells are used to transmit the reference signal resources of the reference signals. Aligned in the time domain and the frequency domain respectively, thereby solving the problem of reference signal transmission based on different basic parameter sets.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to The size of the subcarrier spacing in the base parameter set used by the first cell, and the time domain resource size of each second resource block in the at least one second resource block is equal to the basic parameter set used by the corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

Optionally, the determining module 801 is specifically configured to: determine a time domain resource size of the resource block with the largest time domain resource as a time domain resource size of the reference signal resource, and maximize a resource block of the frequency domain resource. The frequency domain resource size is determined as the frequency domain resource size of the reference signal resource.

Optionally, the determining module 801 is further configured to: determine a resource parameter corresponding to the first resource block, where the resource parameter includes: a time domain resource size of the reference signal resource and a time domain resource size of the first resource block. a ratio, and a ratio of a frequency domain resource size of the reference signal resource to a frequency domain resource size of the first resource block; and a sending module 802, configured to send the resource parameter to the terminal device.

Optionally, the sending module 802 is further configured to: send, to the terminal device, information about a time-frequency resource of the first resource block, and/or information of a time-frequency resource of the at least one second resource block.

Optionally, the determining module 801 is further configured to: determine configuration information, where the configuration information includes a distribution period of the reference signal resource in a time domain and a distribution period of the reference signal resource in a frequency domain; and the sending module 802 further uses The configuration information is sent to the terminal device.

Optionally, the reference signal includes at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS, and a demodulation reference signal DMRS.

Optionally, the reference signal includes a zero power reference signal or a non-zero power reference signal.

Optionally, the network device is configured to coordinate multi-point transmission of CoMP, the second cell being a cell adjacent to the first cell.

It should be noted that in the embodiment of the present invention, the determining module 801 can be implemented by a processor, and the transmission module 802 can be implemented by a transceiver. As shown in FIG. 9, the terminal device 900 may include a processor 910, a transceiver 920, and a memory 930. The transceiver 920 can include a receiver 921 and a transmitter 922. The memory 930 can be used to store related information such as basic parameters and filtering modes, and can also be used to store codes and the like executed by the processor 910. The various components in the terminal device 900 are coupled together by a busbar system 940, wherein the busbar system 940 includes, in addition to the data busbars, a power busbar, a control busbar, and a status signal busbar.

The processor 910 is configured to: determine a first resource block corresponding to the first cell, and at least one second resource block corresponding to the at least one second cell, where a time-frequency resource size of the first resource block, Different from the time-frequency resource size of the at least one second resource block; determining, in the first resource block and the at least one second resource block, a resource block having the largest time domain resource and a resource block having the largest frequency domain resource; The resource block with the largest time domain resource and the resource block with the largest frequency domain resource determine the reference signal resource. The transceiver 920 is configured to send the reference signal to the terminal device on the reference signal resource.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to The size of the subcarrier spacing in the base parameter set used by the first cell, and the time domain resource size of each second resource block in the at least one second resource block is equal to the basic parameter set used by the corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

Optionally, the processor 910 is specifically configured to: determine a time domain resource size of the resource block with the largest time domain resource as a time domain resource size of the reference signal resource, and use a frequency of the resource block with the largest frequency domain resource. The size of the domain resource is determined as the size of the frequency domain resource of the reference signal resource.

Optionally, the processor 910 is further configured to: determine a resource parameter corresponding to the first resource block, where the resource parameter includes: a ratio of a time domain resource size of the reference signal resource to a time domain resource size of the first resource block. And a ratio of a frequency domain resource size of the reference signal resource to a frequency domain resource size of the first resource block; the transceiver 920 is configured to send the resource parameter to the terminal device.

Optionally, the transceiver 920 is further configured to: send, to the terminal device, information about a time-frequency resource of the first resource block, and/or information of a time-frequency resource of the at least one second resource block.

Optionally, the processor 910 is further configured to: determine configuration information, where the configuration information includes a distribution period of the reference signal resource in a time domain and a distribution period of the reference signal resource in a frequency domain; the transceiver 920 is further configured to: The configuration information is sent to the terminal device.

Optionally, the reference signal includes at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS, and a demodulation reference signal DMRS.

Optionally, the reference signal includes a zero power reference signal or a non-zero power reference signal.

Optionally, the network device is configured to coordinate multi-point transmission of CoMP, the second cell being a cell adjacent to the first cell.

Fig. 10 is a schematic structural view of a system wafer of an embodiment of the present invention. The system chip 1000 of FIG. 10 includes an input interface 1001, an output interface 1002, at least one processor 1003, and a memory 1004. The input interface 1001, the output interface 1002, the processor 1003, and the memory 1004 are connected by a bus bar 1005. The processor 1003 is configured to execute code in the memory 1004. When the code is executed, the processor 1003 implements the method performed by the network device 10 in FIGS. 4-7.

The network device 800 shown in FIG. 8 or the network device 900 shown in FIG. 9 or the system chip 1000 shown in FIG. 10 can implement the network device 10 in the method embodiments of FIGS. 4 to 7 described above. The various programs implemented are not repeated here to avoid repetition.

Fig. 11 is a schematic block diagram showing a terminal device 1100 of an embodiment of the present invention. As shown in FIG. 11, the terminal device 1100 includes a determining module 1101 and a receiving module 1102. The determining module 1101 is configured to: determine a first resource block corresponding to the first cell; and determine, according to the first resource block, a reference signal resource, where the time domain resource size of the reference signal resource is equal to the first resource The time domain resource size of the resource block with the largest time domain resource in the block and the at least one second resource block, or an even multiple of the time domain resource size of the resource block having the largest time domain resource, and the frequency domain resource size of the reference signal resource And a frequency domain resource size equal to a resource block of the first resource block and the at least one second resource block having the largest frequency domain resource, or an even multiple of a frequency domain resource size of the resource block having the largest frequency domain resource, the at least one The second resource block is a resource block corresponding to the at least one second cell; the receiving module 1102 is configured to receive, on the reference signal resource, a reference signal sent by the network device of the first cell.

Therefore, the terminal device determines, according to different basic parameter sets used by different cells, the reference signal resources for transmitting the reference signals according to different resource blocks of different cells, so that different cells are used for transmitting the reference signal resources of the reference signals. The time domain and the frequency domain are respectively aligned, thereby solving the problem of reference signal transmission based on different basic parameter sets.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to The size of the subcarrier spacing in the base parameter set used by the first cell, and the time domain resource size of each second resource block in the at least one second resource block is equal to the basic parameter set used by the corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

Optionally, before the determining module 1101 determines the reference signal resource according to the first resource block, the receiving module 1102 is further configured to: receive, by the network device, a resource parameter corresponding to the first resource block, the resource The parameter includes: a first ratio of a time domain resource size of the reference signal resource to a time domain resource size of the first resource block, and a frequency domain resource size of the reference signal resource and a frequency domain resource size of the first resource block. a second ratio; the determining module 1101 is specifically configured to determine, by using a product of a time domain resource size of the first resource block, a product of the first ratio, a time domain resource size of the reference signal resource, and the first resource block The product of the frequency domain resource size and the second ratio is determined as the frequency domain resource size of the reference signal resource.

Optionally, before the determining module 1101 determines the first resource block corresponding to the first cell, the receiving module 1102 is further configured to: receive information about the time-frequency resource of the at least one second resource block sent by the network device. The determining module 1101 is specifically configured to determine, in the first resource block and the at least one second resource block, a time domain resource size of the resource block with the largest time domain resource, and a resource block with the largest frequency domain resource. The size of the frequency domain resource; the time domain resource size of the resource block with the largest time domain resource is determined as the time domain resource size of the reference signal resource, and the frequency domain resource size of the resource block with the largest frequency domain resource is determined as The size of the frequency domain resource of the reference signal resource.

Optionally, the receiving module 1102 is further configured to: receive configuration information sent by the network device, where the configuration information includes a distribution period of the reference signal resource in a time domain and a distribution period of the reference signal resource in a frequency domain; And receiving, according to the configuration information, the reference signal sent by the network device on the plurality of reference signal resources distributed on a periodic basis.

Optionally, the reference signal includes at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS, and a demodulation reference signal DMRS.

Optionally, the reference signal includes a zero power reference signal or a non-zero power reference signal.

Optionally, the terminal device is applied to coordinate coordinated multi-point CoMP, the second cell being a cell adjacent to the first cell.

It should be noted that in the embodiment of the present invention, the determining module 1101 can be implemented by a processor, and the transmission module 1102 can be implemented by a transceiver. As shown in FIG. 12, the terminal device 1200 may include a processor 1210, a transceiver 1220, and a memory 1230. The transceiver 1220 can include a receiver 1221 and a transmitter 1222. The memory 1230 can be used to store related information such as a basic parameter set, a guard band, and a filtering mode, and can also be used to store codes and the like executed by the processor 1210. The various components in the network device 1200 are coupled together by a busbar system 1240, wherein the busbar system 1240 includes, in addition to the data busbars, a power busbar, a control busbar, and a status signal busbar.

The processor 1210 is specifically configured to: determine a first resource block corresponding to the first cell; determine a reference signal resource according to the first resource block, where a time domain resource size of the reference signal resource is equal to the first resource The time domain resource size of the resource block with the largest time domain resource in the block and the at least one second resource block, or an even multiple of the time domain resource size of the resource block having the largest time domain resource, and the frequency domain resource size of the reference signal resource And a frequency domain resource size equal to a resource block of the first resource block and the at least one second resource block having the largest frequency domain resource, or an even multiple of a frequency domain resource size of the resource block having the largest frequency domain resource, the at least one The second resource block is a resource block corresponding to the at least one second cell; the transceiver 1220 is configured to receive, on the reference signal resource, a reference signal sent by the network device of the first cell.

Optionally, the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/or the frequency domain resource size of the first resource block is equal to The size of the subcarrier spacing in the base parameter set used by the first cell, and the time domain resource size of each second resource block in the at least one second resource block is equal to the basic parameter set used by the corresponding cell The sum of the symbol length and the cyclic prefix length, and/or the frequency domain resource size of each of the at least one second resource block is equal to the subcarrier spacing in the base parameter set used by the respective corresponding cell.

Optionally, before the processor 1210 determines the reference signal resource according to the first resource block, the transceiver 1220 is further configured to: receive, by the network device, a resource parameter corresponding to the first resource block, where the resource parameter includes a first ratio of a time domain resource size of the reference signal resource to a time domain resource size of the first resource block, and a frequency domain resource size of the reference resource resource and a second frequency domain resource size of the first resource block The processor 1210 is specifically configured to: determine a product of a time domain resource size of the first resource block and the first ratio as a time domain resource size of the reference signal resource, and set a frequency domain of the first resource block. The product of the resource size and the second ratio is determined as the frequency domain resource size of the reference signal resource.

Optionally, before the processor 1210 determines the first resource block corresponding to the first cell, the transceiver 1220 is further configured to: receive information about the time-frequency resource of the at least one second resource block sent by the network device; The device 1210 is specifically configured to: determine, in the first resource block and the at least one second resource block, a time domain resource size of the resource block with the largest time domain resource, and a frequency domain resource of the resource block with the largest frequency domain resource The size of the time domain resource of the resource block with the largest time domain resource is determined as the time domain resource size of the reference signal resource, and the frequency domain resource size of the resource block with the largest frequency domain resource is determined as the reference signal. The size of the frequency domain resource of the resource.

Optionally, the transceiver 1220 is further configured to: receive configuration information sent by the network device, where the configuration information includes a distribution period of the reference signal resource in a time domain and a distribution period of the reference signal resource in a frequency domain; The configuration information receives the reference signal sent by the network device on the reference signal resource distributed on a periodic basis.

Optionally, the reference signal includes at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS, and a demodulation reference signal DMRS.

Optionally, the reference signal includes a zero power reference signal or a non-zero power reference signal.

Optionally, the terminal device is applied to coordinate coordinated multi-point CoMP, the second cell being a cell adjacent to the first cell.

Figure 13 is a schematic structural view of a system wafer of an embodiment of the present invention. The system chip 1300 of FIG. 13 includes an input interface 1301, an output interface 1302, at least one processor 1303, and a memory 1304. The input interface 1301, the output interface 1302, the processor 1303, and the memory 1304 are connected by a bus bar 1305. The processor 1303 is configured to execute code in the memory 1304, and when the code is executed, the processor 1303 implements the method performed by the terminal device 20 in FIGS. 4 to 7.

The terminal device 1000 shown in FIG. 10 or the terminal device 1100 shown in FIG. 11 or the system wafer 1200 shown in FIG. 12 can realize the implementation by the terminal device 20 in the method embodiments of FIGS. 4 to 7 described above. For each procedure, to avoid repetition, we will not repeat them here.

It can be understood that the processor in the embodiment of the present invention may be an integrated circuit chip with signal processing capability. In the implementation program, the steps of the foregoing method embodiments may be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above processor may be a general-purpose processor, a digital signal processor ("DSP"), an application specific integrated circuit (ASIC), or a field programmable gate array (Field Programmable Gate). Array, referred to as "FPGA" or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the present invention may be directly implemented as a hardware decoding processor, or may be performed by using a combination of hardware and software modules in the decoding processor. The software module can be located in a random storage medium, a flash memory, a read-only memory, a programmable read-only memory or an electrically readable and writable programmable memory, a temporary storage device, and the like. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps of the foregoing method.

It can be understood that the memory in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (Read-Only Memory (ROM) for short), a programmable read-only memory (Programmable ROM (PROM) for short), and an erasable programmable read-only memory. (Erasable PROM, referred to as "EPROM"), electrically erasable programmable read only memory (Electrically EPROM ("EEPROM") or flash memory. The volatile memory may be a Random Access Memory (RAM), which is used as an external cache memory. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic RAM ("DRAM"), synchronous dynamics. Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced) SDRAM (referred to as "ESDRAM"), synchronously connected dynamic random access memory (Synchlink DRAM, "SLDRAM" for short) and direct memory bus random access memory (Direct Rambus RAM, referred to as "DR RAM"). It should be noted that the memory of the systems and methods described herein are intended to comprise, without being limited to, these and any other suitable types of memory.

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" herein is merely an association describing the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, while A and B exist, and B exists separately. three situations. In addition, the character "/" in the text generally indicates that the contextual object is an "or" relationship.

It should be understood that in the embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in the form of an electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working procedures of the system, the device and the unit described above can refer to the corresponding programs in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, a plurality of units or components may be combined or may be integrated into Another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separate. The components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist as a separate entity, or two or more units may be integrated into one unit.

This function, if implemented as a software functional unit and sold or used as a standalone product, can be stored on a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product in essence or in part of the prior art, and the computer software product is stored in a storage medium, including several The instructions are for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of various embodiments of the present invention. The foregoing storage medium includes: a flash drive, a mobile hard disk, a read-only memory ("ROM"), a random access memory ("RAM"), a disk or a disc. And other media that can store code.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the scope of the patent application.

10, 30, 800‧‧‧ network devices

20, 900, 1100, 1200‧‧‧ Terminal devices

801, 1101‧‧‧determined module

802‧‧‧ transmit module

901, 1003, 1201, 1303‧‧ ‧ processors

902, 1202‧‧‧ Receiver

903, 1203‧‧‧ transmitter

904, 1004, 1204, 1304‧‧‧ memory

1000, 1300‧‧‧ system chip

1001, 1301‧‧‧ input interface

1002, 1302‧‧‧ output interface

1005, 1305‧ ‧ busbar

1102‧‧‧ receiving module

CSI-RS‧‧‧Channel Status Information Reference Signal

LTE‧‧‧ Long-term evolution

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work. FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present invention. Fig. 2(a) is a diagram showing the condition of the channel measured according to the CSI-RS when there is cell interference in the prior art. Fig. 2(b) is a diagram showing the condition of the channel measured according to the CSI-RS when there is cell interference in the prior art. Figure 3 is a diagram of the effect on the transmission of reference signals when there are different sets of basic parameters. FIG. 4 is a flow diagram of a process for transmitting a reference signal according to an embodiment of the present invention. FIG. 5 is a schematic diagram of reference signal resources based on different basic parameter sets according to an embodiment of the present invention. The process interaction diagram for determining the reference signal in the embodiment of the present invention shown in FIG. FIG. 7 is a flow diagram of a process for determining a reference signal according to another embodiment of the present invention. Figure 8 is a block diagram showing the structure of a network device according to an embodiment of the present invention. Figure 9 is a block diagram showing the structure of a network device according to an embodiment of the present invention. Fig. 10 is a schematic structural view of a system wafer of an embodiment of the present invention. Figure 11 is a block diagram showing the structure of a terminal device according to an embodiment of the present invention. Figure 12 is a block diagram showing the structure of a terminal device according to an embodiment of the present invention. Figure 13 is a schematic structural view of a system wafer of an embodiment of the present invention.

Claims (34)

A method for transmitting a reference signal, comprising: a network device of a first cell determining a first resource block corresponding to the first cell, and at least one second resource corresponding to at least one second cell a block, wherein a time-frequency resource size of the first resource block is different from a time-frequency resource size of the at least one second resource block; the network device is in the first resource block and the at least one second resource block, Determining a resource block with the largest time domain resource and a resource block with the largest frequency domain resource; the network device determines a reference signal resource according to the resource block with the largest time domain resource and the resource block with the largest frequency domain resource; The network device sends a reference signal to the terminal device on the reference signal resource. The method of claim 1, wherein the first resource block has a time domain resource size equal to a sum of a symbol length and a cyclic prefix length of the base parameter set used by the first cell, and/or The size of the frequency domain resource of the first resource block is equal to the size of the subcarrier spacing in the basic parameter set used by the first cell, and the time domain resource size of each second resource block in the at least one second resource block. The sum of the symbol length and the cyclic prefix length in the base parameter set used by the respective corresponding cell, and/or the frequency domain resource size of each second resource block in the at least one second resource block is equal to the corresponding The subcarrier spacing in the base parameter set used by the cell. The method of claim 1 or 2, wherein the network device determines a reference signal resource according to the resource block with the largest time domain resource and the resource block with the largest frequency domain resource. The method includes: determining, by the network device, a time domain resource size of the resource block with the largest time domain resource as a time domain resource size of the reference signal resource, and determining a frequency domain resource size of the resource block with the largest frequency domain resource. The frequency domain resource size of the reference signal resource. The method of any one of claims 1 to 3, wherein the method further comprises: a network device determining a resource parameter corresponding to the first resource block, the resource parameter comprising The ratio of the time domain resource size of the reference signal resource to the time domain resource size of the first resource block, and the ratio of the frequency domain resource size of the reference signal resource to the frequency domain resource size of the first resource block; The road device transmits the resource parameter to the terminal device. The method of any one of the preceding claims, wherein the method further comprises: transmitting, by the network device, the information of the time-frequency resource of the first resource block to the terminal device And/or information of the time-frequency resource of the at least one second resource block. The method of any one of claims 1 to 5, wherein the method further comprises: the network device determining a configuration information, the configuration information including the reference signal resource in a time domain a distribution period and a distribution period of the reference signal resource in the frequency domain; the network device sends the configuration information to the terminal device. The method of any one of claims 1 to 6, wherein the reference signal comprises at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS, and a solution. Adjust the reference signal DMRS. The method of any one of claims 1 to 7, wherein the reference signal comprises a zero power reference signal or a non-zero power reference signal. The method according to any one of claims 1 to 8, wherein the method is applied to coordinated multi-point transmission of CoMP, the second cell being a cell adjacent to the first cell. yuan. A method for transmitting a reference signal, comprising: a terminal device determining a first resource block corresponding to a first cell; the terminal device determining a reference signal resource according to the first resource block, wherein the reference The time domain resource size of the signal resource is equal to the time domain resource size of the resource block with the largest time domain resource in the first resource block and the at least one second resource block, or the time domain resource size of the resource block with the largest time domain resource. An even multiple, the frequency domain resource size of the reference signal resource is equal to the frequency domain resource size of the resource block with the largest frequency domain resource in the first resource block and the at least one second resource block, or is equal to the resource with the largest frequency domain resource. An even multiple of a frequency domain resource size of the block, the at least one second resource block being a resource block corresponding to the at least one second cell; the terminal device receiving, on the reference signal resource, the network device of the first cell A reference signal sent. The method of claim 10, wherein the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a base parameter set used by the first cell, and/or The size of the frequency domain resource of the first resource block is equal to the size of the subcarrier spacing in the basic parameter set used by the first cell, and the time domain resource size of each second resource block in the at least one second resource block. The sum of the symbol length and the cyclic prefix length in the base parameter set used by the respective corresponding cell, and/or the frequency domain resource size of each second resource block in the at least one second resource block is equal to the corresponding The subcarrier spacing in the base parameter set used by the cell. The method of claim 10, wherein before the terminal device determines a reference signal resource according to the first resource block, the method further includes: the terminal device receiving the network a resource parameter corresponding to the first resource block sent by the device, where the resource parameter includes: a first ratio of a time domain resource size of the reference signal resource to a time domain resource size of the first resource block, and the reference signal resource And determining, by the terminal device, a reference signal resource according to the first resource block, where the terminal device includes: The product of the time domain resource size and the first ratio is determined as the time domain resource size of the reference signal resource, and the product of the frequency domain resource size of the first resource block and the second ratio is determined as the reference signal resource. The size of the frequency domain resource. The method of claim 10, wherein before the terminal device determines a first resource block corresponding to the first cell, the method further comprises: the terminal device receiving the network And the device sends the information of the time-frequency resource of the at least one second resource block; the terminal device determines, according to the first resource block, a reference signal resource, where: the terminal device is in the first resource block and the at least one second resource In the block, determining a time domain resource size of the resource block with the largest time domain resource, and a frequency domain resource size of the resource block with the largest frequency domain resource; a time domain resource size of the resource block that the terminal device maximizes the time domain resource The time domain resource size of the reference signal resource is determined, and the frequency domain resource size of the resource block with the largest frequency domain resource is determined as the frequency domain resource size of the reference signal resource. The method of any one of the preceding claims, wherein the method further comprises: the terminal device receiving a configuration information sent by the network device, the configuration information including the reference signal The distribution period of the resource in the time domain and the distribution period of the reference signal resource in the frequency domain; the terminal device receives a reference signal sent by the network device on the reference signal resource, including: the terminal device according to the configuration information Receiving the reference signal sent by the network device on the reference signal resource distributed on a periodic basis. The method of any one of claims 10 to 14, wherein the reference signal comprises at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS, and a solution Adjust the reference signal DMRS. The method of any one of claims 10 to 15 wherein the reference signal comprises a zero power reference signal or a non-zero power reference signal. The method of any one of claims 10 to 16, wherein the method is applied to coordinated multi-point transmission of CoMP, the second cell being a cell adjacent to the first cell yuan. A network device, wherein the network device is located in a first cell, the network device includes a determining module and a sending module, wherein the determining module is configured to: determine, corresponding to the first cell a first resource block, and at least one second resource block corresponding to the at least one second cell, wherein a time-frequency resource size of the first resource block is different from a time-frequency resource size of the at least one second resource block; Determining, in the first resource block and the at least one second resource block, a resource block having the largest time domain resource and a resource block having the largest frequency domain resource; the resource block according to the time domain resource being the largest, and the frequency domain resource The largest resource block determines a reference signal resource; the sending module is configured to send a reference signal to a terminal device on the reference signal resource. The network device of claim 18, wherein the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and Or, the frequency domain resource size of the first resource block is equal to the size of the subcarrier spacing in the basic parameter set used by the first cell, and the time domain resource of each second resource block in the at least one second resource block The size is equal to the sum of the symbol length and the cyclic prefix length in the basic parameter set used by the respective corresponding cell, and/or the frequency domain resource size of each second resource block in the at least one second resource block is equal to the The subcarrier spacing in the base parameter set used by the corresponding cell. The network device of claim 18 or 19, wherein the determining module is specifically configured to: determine a time domain resource size of the resource block having the largest time domain resource as the reference signal The time domain resource size of the resource, and the frequency domain resource size of the resource block with the largest frequency domain resource is determined as the frequency domain resource size of the reference signal resource. The network device according to any one of the preceding claims, wherein the determining module is further configured to: determine a resource parameter corresponding to the first resource block, the resource parameter The ratio of the time domain resource size of the reference signal resource to the time domain resource size of the first resource block, and the ratio of the frequency domain resource size of the reference signal resource to the frequency domain resource size of the first resource block; The sending module is configured to send the resource parameter to the terminal device. The network device according to any one of claims 18 to 21, wherein the transmitting module is further configured to: send the time-frequency resource of the first resource block to the terminal device Information, and/or information of time-frequency resources of the at least one second resource block. The network device according to any one of the preceding claims, wherein the determining module is further configured to: determine a configuration information, where the configuration information includes the reference signal resource in a time domain And a distribution period of the reference signal resource in the frequency domain; the sending module is further configured to send the configuration information to the terminal device. The network device according to any one of claims 18 to 23, wherein the reference signal comprises at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI-RS and a demodulation reference signal DMRS. The network device according to any one of claims 18 to 24, wherein the reference signal comprises a zero power reference signal or a non-zero power reference signal. The network device according to any one of claims 18 to 25, wherein the network device is configured to coordinate multi-point transmission of CoMP, the second cell being the first cell Adjacent cells. A terminal device, comprising: a determining module and a receiving module, wherein the determining module is configured to: determine a first resource block corresponding to a first cell; according to the first resource block, Determining a reference signal resource, where the time domain resource size of the reference signal resource is equal to the time domain resource size of the resource block with the largest time domain resource in the first resource block and the at least one second resource block, or equal to the time domain An even multiple of the time domain resource size of the resource block with the largest resource, and the frequency domain resource size of the reference signal resource is equal to the frequency domain resource of the resource block with the largest frequency domain resource in the first resource block and the at least one second resource block. The size, or an even multiple of the frequency domain resource size of the resource block with the largest frequency domain resource, the at least one second resource block is a resource block corresponding to the at least one second cell; the receiving module is configured to A reference signal sent by a network device receiving the first cell on the reference signal resource. The terminal device according to claim 27, wherein the time domain resource size of the first resource block is equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the first cell, and/ Or, the frequency domain resource size of the first resource block is equal to the size of the subcarrier spacing in the basic parameter set used by the first cell, and the time domain resource size of each second resource block in the at least one second resource block. And equal to a sum of a symbol length and a cyclic prefix length in a basic parameter set used by the respective corresponding cell, and/or a frequency domain resource size of each second resource block in the at least one second resource block, equal to each corresponding The sub-carrier spacing in the base parameter set used by the cell. The terminal device of claim 27 or 28, wherein before the determining module determines a reference signal resource according to the first resource block, the receiving module is further configured to: receive the a resource parameter corresponding to the first resource block sent by the network device, where the resource parameter includes: a first ratio of a time domain resource size of the reference signal resource to a time domain resource size of the first resource block, and the first ratio a second ratio of the frequency domain resource size of the reference resource resource to the frequency domain resource size of the first resource block; the determining module is specifically configured to: use the time domain resource size of the first resource block and the first ratio The product is determined as the time domain resource size of the reference signal resource, and the product of the frequency domain resource size of the first resource block and the second ratio is determined as the frequency domain resource size of the reference signal resource. The terminal device of claim 27 or 28, wherein the receiving module is further configured to: receive before the determining module determines a first resource block corresponding to the first cell The information about the time-frequency resource of the at least one second resource block sent by the network device; the determining module is specifically configured to: determine, in the first resource block and the at least one second resource block, that the time domain resource is the largest The time domain resource size of the resource block and the frequency domain resource size of the resource block with the largest frequency domain resource; the time domain resource size of the resource block having the largest time domain resource is determined as the time domain resource size of the reference signal resource And determining the frequency domain resource size of the resource block with the largest frequency domain resource as the frequency domain resource size of the reference signal resource. The terminal device according to any one of the preceding claims, wherein the receiving module is further configured to: receive a configuration information sent by the network device, where the configuration information includes the reference The distribution period of the signal resource in the time domain and the distribution period of the reference signal resource in the frequency domain; according to the configuration information, the reference signal sent by the network device is received on the plurality of reference signal resources distributed on a periodic basis. The terminal device according to any one of claims 27 to 31, wherein the reference signal comprises at least one of the following: a specific cell reference signal CRS, a channel state information reference signal CSI -RS and a demodulation reference signal DMRS. The terminal device according to any one of claims 27 to 32, wherein the reference signal comprises a zero power reference signal or a non-zero power reference signal. The terminal device according to any one of claims 27 to 33, wherein the terminal device is applied to coordinated multi-point transmission CoMP, the second cell being adjacent to the first cell Cell.